I am not very clear about the concepts of these two kinds of relaxations.
I hope to get a simple explanation, so that I have a clear understanding of the two processes.
Thank you very much!
Dear Shuang Su
these two kinds of relaxation can be interpreted with "Stillinger model". In the framework of Stillinger’s model of inherent structures:
α-relaxation involves the sampling of deep, separated potential energy minima,
β-relaxation involves the sampling of adjacent and shallow minima
so to keep it simple and clear its better say :
α-relaxation refers to the cooperative relaxation of molecules that occurs on the order of 1–10 s or longer.
β-relaxation is faster and refers to noncollective motion that occurs in the range of 10-5 s and shorter.
A high level explanation for these two types of relaxation can be found in an informative book in chapter 13 page 328 by Professor ARUN K. VARSHNEYA and
Professor JOHN C. MAURO :
Fundamentals of Inorganic Glasses (Third Edition)
Book ISBN: 9780128162262
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